Fluorene-Terminated π-Conjugated Spiro-Type Hole Transport Materials for Perovskite Solar Cells

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2025-01-23 DOI:10.1021/acsenergylett.4c03233

Mengde Zhai, Kaihuai Du, Chengyang Liu, Cheng Chen, Guixiang Li, Haoxin Wang, Ziyang Xia, Jinman Yang, Hui Xu, Aili Wang, Toshinori Matsushima, Zhanglin Guo, Meng Li, Antonio Abate, Paul J. Dyson, Mohammad Khaja Nazeeruddin, Ming Cheng

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Abstract

Spiro-OMeTAD is a widely used hole transport material (HTM) in perovskite solar cells (PSCs), but its inherent low hole mobility and poor thermal stability affect the overall performance of PSCs. To overcome these limitations, we develop a series of fluorene-terminated Spiro-type HTMs, engineered by modulating the fluorene substitution site and π-conjugated intensity. Among these, the p-BM material exhibits high energetic ordering in film, appropriate energy levels, and efficient carrier extraction, enabling PSCs to achieve power conversion efficiencies (PCEs) of 25.5% and 24.03% for aperture areas of 0.0625 and 1 cm², respectively. Additionally, a perovskite solar mini-module (size 16 cm²) based on p-BM HTM achieved a PCE of 22.4%. More importantly, p-BM exhibits a high glass transition temperature and enhanced film hydrophobicity, significantly improving the stability of devices in relation to heat and humidity. Our findings provide a promising alternative HTM for developing efficient and stable perovskite photovoltaic devices.

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钙钛矿太阳能电池用端氟π共轭螺型空穴输运材料

Spiro-OMeTAD是钙钛矿太阳能电池（PSCs）中广泛使用的空穴传输材料（HTM），但其固有的低空穴迁移率和较差的热稳定性影响了PSCs的整体性能。为了克服这些限制，我们通过调节芴取代位点和π共轭强度，开发了一系列以芴为端部的spiro型HTMs。其中，p-BM材料在薄膜中表现出高能量有序，合适的能级和高效的载流子提取，使得PSCs在孔径面积为0.0625和1 cm2时分别实现了25.5%和24.03%的功率转换效率。此外，基于p-BM HTM的钙钛矿太阳能迷你组件（尺寸16 cm2）实现了22.4%的PCE。更重要的是，p-BM具有较高的玻璃化转变温度和增强的膜疏水性，显著提高了器件在高温和湿度下的稳定性。我们的发现为开发高效稳定的钙钛矿光伏器件提供了一种有希望的替代热媒材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.